Connection Of Solar Collectors And Sizing The Expansion Vessel (Type Wwks); Flow Pressure Drop In The Pipework - Viessmann VITOCAL 160-A Technical Manual

Sizing
(cont.)
Ventilation element
60
50
40
30
20
10
0
10 20
Air flow rate in m³/h
A without filter
B with filter

Flow pressure drop in the pipework

3
2
1
0
50 100
Air flow rate in m³/h
A Flexible pipe DN 125
B Spiral-seam tube DN 125 (smooth inside)
Note
Only use extract lines with DN 125 for flow rates up to 150 m
3
flow rates from 150 m /h use DN 160 pipeworks.

7.2 Connection of solar collectors and sizing the expansion vessel (type WWKS)

Up to 6 m 2 flat-plate collectors or 3 m
to the Vitocal 160-A. Provide pipelines from the collectors to the
Vitocal 160-A on site. Also install a pump station (Solar-Divicon) in the
solar circuit. The Vitocal 160-A type WWKS already features the con-
nections required for connection to the solar circuit. The internal solar
indirect coil for DHW heating is also fitted.
Provide thermal insulation for the pipework using a material capable
of withstanding temperatures up to 185 ºC. This requirement also
applies to the use of fixing clamps.
VITOCAL 160-A
B
30 40 50
A
B
150 200
3 /h, with
2 tube collectors can be connected
A
60
C
D
250
C Flexible pipe DN 160
D Spiral-seam tube DN 160 (smooth inside)
Connect a suitably sized expansion vessel to the pipework to be instal-
led.
To achieve the required pump rate it is necessary to calculate the
pressure drop of the pipework including that of the collector area. With
regard to implementation, installation, calculation and limits of appli-
cation of the solar thermal system, the latest version of the technical
guide, service instructions and installation instructions for the solar
thermal system apply.
7
VIESMANN
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